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Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued September 2 at 10:08AM CDT until September 4

Affecting Iowa; Johnson; Cedar; Muscatine; Scott; Keokuk; Washington; Louisa; Jefferson; Henry; Des Moines; Van Buren; Lee; Rock Island; Henry; Bureau; Putnam; Mercer; Henderson; Warren; Hancock; McDonough; Scotland; Clark

In effect until: Sep 2, 2026, 11:15 PM

Iowa; Johnson; Cedar; Muscatine; Scott; Keokuk; Washington; Louisa; Jefferson; Henry; Des Moines; Van Buren; Lee; Rock Island; Henry; Bureau; Putnam; Mercer; Henderson; Warren; Hancock; McDonough; Scotland; Clark

Likely impact; effects through 11:15 PM.

Stay in air conditioning if possible. Drink water regularly and check on elderly neighbors.

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Read the original bulletin (official text)
* WHAT...Dangerously hot conditions with heat index values up to 105.

* WHERE...Portions of north central, northwest, and west central
Illinois, east central and southeast Iowa, and northeast Missouri.

* WHEN...Until 7 PM CDT Friday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™